Set-25 General Science (English) Railway NTPC and Railway Group D 2019 Previous Year Questions | Study Virus

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We are providing the most important General Science Previous year Questions for RRB NTPC 2019, RRB Group D 2019, SSC 2019 and all other competitive exams. These questions have very high chances to be asked in RRB NTPC 2019, RRB Group D 2019.

Set-25  General Science Previous Year Questions

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1.Concentration of water vapour in troposphere is –
1. 0­4%
2. 10-14%
3. 20-24%
4. 30-34%

Ans:1

2. First country to impose carbon tax is ________.
1. Australia
2. Iceland
3. USA
4. New Zealand

Ans:4

3.In the following reaction, fill in the blank.
Acid + Base → _______ + Water
1. Carbon dioxide
2. Metal Oxide
3. Hydrogen Gas
4. Salt

Ans:4

4.Which of the following is a characteristic of an exothermic reaction?
1. Release of heat
2. Absorption of heat
3. Doesn’t involve any change in temperature
4. None of the option is correct

Ans:1

5. __________ acts as a shield absorbing ultraviolet radiation from the sun.
1. Troposphere
2. Stratosphere
3. Mesosphere
4. Ionosphere

Ans:2

6. ________ is made by mixing iron with carbon and metals like chromium, nickel and manganese.
1. Ship
2. Stainless Steel
3. Rust
4. Ozone

Ans:2

7. The salt concentration (measured as salinity in parts per thousand), is _______% in sea.
1. 10-20
2. 30-35
3. 40-50
4. 60-70

Ans:2

8.Fabric made from_________ does not get wrinkled easily.
1. Cotton
2. Flax
3. Silk
4. Polyester

Ans:4

9.What is formed when Carbon Dioxide is passed through Lime Water?
1. Copper Sulphate
2. Calcium Carbonate
3. Magnesium Oxide
4. Baking Soda

Ans:2

10.All isotopes of the same element have _________.
1. different atomic numbers and different atomic mass
2. different atomic numbers and the same atomic mass
3. the same atomic number but different atomic masses
4. the same atomic number and the atomic mass

Ans:3

11.Nitric acid does not react with –
1. Gold
2. Copper
3. Zinc
4. Iron

Ans:1

12.Which of the following gases is known as “Laughing Gas”?
1. Nitrous oxide
2. Nitrogen peroxide
3. Nitrogen
4. Nitric oxide

Ans:1

13.Name two elements that find wide application in transistor industry.
1. Silicon and Germanium
2. Carbon and Platinum
3. Iridium and Germanium
4. Tungsten and Platinum

Ans:1

14. Which one of the following is known as the ‘brown coal’?
1. Anthracite
2. Bituminous
3. Coke
4. Lignite

Ans:4

15. Hydrogen bomb is based on the principle of –
1. controlled fission reaction
2. uncontrolled fission reaction
3. controlled fusion reaction
4. uncontrolled fusion reaction

Ans:4

16.The technique of calculating the age of fossil organisms is –
1. Radiocarbon dating
2. Electroporation
3. Counting the annual rings
4. Micro Manipulation

Ans:1

17. Iodised salt is beneficial for –
1. Lowering of blood pressure
2. Prevention of dehydration
3. Thyroid function
4. Salivary glands

Ans:3

18. Submarines move under water. They have engines that run on –
1. Solar energy
2. Diesel
3. Batteries
4. Steam

Ans:2

19. The residue left after extracting juice from sugar beet and sugarcane is called –
1. Molasses
2. Bagasse
3. Whey
4. Biomass

Ans:2

20. Gasohol is a mixture of:
1. Gasoline and Butanol
2. Gasoline and Ethanol
3. Gasoline and Propanol
4. Methanol and Ethanol

Ans:2